Rolandseck Tower

opposite the Drachenfels. The legend is that when Roland went
to the wars, a false report of his death was brought to his betrothed,
who retired to a convent in the isle of Nonnewerth. When Roland
returned home flushed with glory, and found that his lady-love had
taken the veil, he built the castle which bears his name, and overlooks
the nunnery, that he might at least see his heart-treasure, lost to
him for ever.